In any product design it has two major steps one is product design and Product manufacturing.The designer have to design a product on the basis of market analysis,customer need,style,raw material,manufacturing space,used technology.And also manufacturer have to manufacture it on the basis of design of product which is made by designer and also think about the repair-ability and disposal off this product. So design and Manufacturing is depending on each other so there have to some correlate or integrator and that is why integration is needed.

Integration is a mathedology by which product design and manufacturing process are integrated together into manufacturable , salable at profit with highest customer satisfaction with grate quality and reliability.